Mrs Kennedy is buying pencils for each of 315 students st Hamilton elementary. The pencils are sold in boxes of ten. How can she use rounding to decide how many pencils to buy?
You would divide 315/10. or you would round 315 to 320.
She needs to buy 32 boxes. You could divided 315 by 10 which would be 31.5 which that means how many boxes she needs but you need to round up to .5 to get 32 and then she would need 32 boxes.